Conventional generators and test stations can be used to determine whether a device complies with the standard noise immunity required by law. However, weak spots on an assemby can not be presicely located. Detailed information about the weak spot`s location, the susceptibility and type of action (E or B field susceptibility) are required to eliminate them at the source in the most straightforward way. The handy mini burst field generators are always at hand and any electronic developer can use them for tests at the workplace.